Device for electrically-exhibiting a danger signal on a locomotive



sept. 13, 1927.

DEVICE Foa ELEGTRIGALLY Exm'mna .A :imesh SIGNAL ou A Locouo'rrvsf v Filed April 21. 1927 I H. JACOBY Patented Sept. 13, 1927. l Y i' i Y UNITED STATES PATENT OFFICE.

HERMANN JACOBYQOF EBERSTADT, NEAR DARMSTADT, GERMANY.

DEVICE FOR ELECTRICALLY-EXHIBITING A DANGER SIGNAL ON LOCOMOTIVE.

Application filed April 21, 1927, Serial No. 185,645, and in Germany March 16, 1927.

The invention relates toa device for ex- Having novsT particularly described and "i hibiting a danger signal on a locomotive ascertained the nature of this said invention passing a semaphore at danger. and in what manner the same is to be per- The invention is illustrated diagrammatiformed I declare that What I claim is:

i cally in the accompanying drawing.` In a device for exhibiting a danger signal The novelty of this device consists in they on a locomotive passing a semaphore at dan- 35 use ot two continuous current-circuits l) and ger, the use of two current-circuits which independent of each other which have are independent of each other and have only only an occasional connexion by transfer an occasional connexion by transfer ot' an 1o oi' an electro-magnetic tield It. The one cirelectromagnetic field, the one circuit being incuit Y) is installed on the locomotive-engine stalled on the locomotive-engine and having 4o c and has i'or closing of the circuit b a for closing ot' said one circuit a complete complete register of relay armatures Z iitted register of relay armatures fitted on the on the under side e along the engine c While under side along the passing locomotive, 15 the other circuit f with the electromagnet g While the other circuit is arranged With an is arranged on the earth between the yrails electromagneton the earth between the rails and connects to the stop-signalarm a of a and is connected to the stop signal arm or semaphore which closes the circuit f When the semaphore Which closes said other circuit the signal-arm a is put horizontal for stop, when the signal-arm is put for stop and 2U whereby the current f 'flows out of battery or energizes the electromagnet for sending out A. C. generator Zand energizes the electroits electromagnetic field which is traversed 5 magnet g for sending out its electro-magnetic by all the relay-armatures in sequence and field h, which is traversed by all relay armaattracts them and therefore closes the circuit tures d itted along the under side e of the for exhibiting a danger signal on the loco- ?5 passing engine c and all relay-armatures d motive, which signal is controlled over mulare attracted in sequence and close the cirtiple circuits including the respective arma- 55 cuit l) of battery lo for exhibiting the danger tures. signal i, which is controlled over the multiple In testimony whereof I afix my signature circuits including the respective armatures d. HERMANN J ACOBY. 

